Baited camera observations of deep-sea demersal fishes of the northeast Atlantic Ocean at 15–28°N off West Africa
Baited camera observations of deep-sea demersal fishes of the northeast Atlantic Ocean at 15–28°N off West Africa
复制标题
对西非附近北纬 15-28° 东北大西洋深海底层鱼类的诱饵相机观测
DOI：
10.1007/s00227-002-0833-6
复制
发表时间：
2002
期刊：
影响因子：
2.4
通讯作者：
Bagley P.
中科院分区：
文献类型：
--
作者：
Henriques C.;P. I.;Bagley P.
摘要。这是首次在大西洋东北部低纬度地区部署自主自由落体飞行器AUDOS。在西非近海上升流区附近的三个站点，用诱饵相机对深底鱼类进行了观测：加那利（27°20′n, 16°59′w）、佛得角台地（17°45′n, 20°30′w）和佛得角深海平原（15°00′n, 20°30′w）。该饵料的主要诱捕种类为长尾线虫（Nematonurus）。在饵料中观察到的其他鱼类有鳗（一种zoarcid） Histiobranchusbathybius，以及蛇目（Barathritesiris和Spectrunculusgrandis）。将研究区与富营养化的豪猪深海平原（48°50′n, 16°30′w）和贫营养化的马德拉深海平原（31°00′n, 20°00′w）进行了比较。它们位于北纬40°00°的拟议动物区隔的两侧，北部有大量的大型尾尾鱼，南部有较少的小型鱼类。本研究发现，在17°00′n地区有大量的大型c (N.) armatus，这违反了这一假定的动物地理分界。研究表明，西非海域的高初级生产力和上升流维持了这一深海底栖鱼类群。
Abstract. For the first time the autonomous free-fall vehicle AUDOS was deployed at low latitudes in the northeast Atlantic Ocean. Observations of deep demersal fishes attracted to baited cameras were made at three stations near upwelling areas off West Africa: Canaries (27°20′N, 16°59′W), Cape Verde Terrace (17°45′N, 20°30′W), and Cape Verde Abyssal Plain (15°00′N, 20°30′W). The grenadier Coryphaenoides (Nematonurus) armatus was the main species attracted to the bait. Other fish species observed at bait were the eel Histiobranchusbathybius, a zoarcid, and the ophidiids Barathritesiris and Spectrunculusgrandis. A comparison was made between this study area and the stations Porcupine Abyssal Plain (48°50′N, 16°30′W), which is eutrophic, and Madeira Abyssal Plain (31°00′N, 20°00′W), which is oligotrophic. These are situated on either side of a proposed faunal divide at 40°00′N with a high abundance of large species of rattails to the north and lower biomass of smaller fish species to the south. This study revealed a high abundance of large C. (N.) armatus at 17°00′N, which is a violation of this putative zoogeographic divide. It is suggested that high primary productivity and upwelling off West Africa sustain this assemblage of deep demersal fishes.